Apparatus for demonstrating ocular fluorescence.



F. A. SCHANZ.

APPARATUS .FOR DBMONSTRATING OGULAB. PLUORESGENGE.

APPLICATION FILED SEPT. 22,1913.

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FRIEDRICH ALBIN SCHANZ, OF DRESDEN, GERMANY.

APPARATUS FOR DEMONSTRATIG kOCULl-ll FLUORESCENGE.

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To all whom t may concern.'

Be it known that l, FRInDnrcH ALBIN Soni-mz, a resident of the city of Dresden, in the `Empire of Germany, and a subject of the King of Saxony, have invented certain new and useful improvements in or Relating to Apparatus for Demonstrating @cular Fluorescence, of which the folloW- ing' is a speciication.

It has been proved t-hat the known fluorescence of the human eye is produced by daylight.

The present application relates to an apparatus by means of Which it is possible to observe the fluorescence of ones own eye.

The apparatus is chiefly intended for teaching purposes, that is to say, forms a medium for teaching.

A construction of the apparatus is shown in the accompanying drawing in whichv Figure l is a vertical longitudinal section, and Fig. 2 a horizontal cross section.

It chiefly consists ofa box forming a dark chamber, the inner Walls of which are kept black. Inside one Wall a of the said box is arranged a mirror Z). On the opposite side, the box is opened, and the upper and bottom Walls c and d are provided With such recesses e and f that, on the box being brought against the face of the user in the manner shown in Fig. l, as perfect closing as regards light is obtained as possible. In order to improve-this action, the edges of the recesses are provided With plush strips g which enable a tight closing to be obtained.

rlhe lateral Walls 72, and z' are provided with openings. For closing the said openings, is used a plate 7c o-f dark blue glass and a Wooden slide Z. In order to enable these two plates to be easily interchanged .with each other, guides are formed in the lateral Walls z and z' by means of ledges m and the tWo plates nl. After the introduction, the plates are held fast by the fastener o. On the lower side of the box is provided a plate 70 With a screw threaded perforation g in order to enable the box to be secured if desired to a stand or the like. The apparatus is used by bringing the box,

Specication of `Letters Patent.

Application filed September 22, 1913.

Patented July 28, 1914. serial no. 791,059.

vin the manner shown in Fig. l, close to the vdark chamber and provided on one side With an opening adapted to the shape of the face, and on the opposite side With a mirror arranged in the box, While in one of the other Wall surfaces is inserted a dark blue glass plate or the like, through which daylight falls on the eyes of the user holding the apparatus in front of his face.

2. An apparatus for demonstrating ocular fluorescence, comprising a box forming a dark chamber and provided at one side with recessed edges adapted to the shape of the face, and on the opposite side with a mirror arranged in the box, While in one of the other Wall surfaces is inserted a dark blue glass plate or the like, through which daylight falls on the eyes of the user holding the apparatus in front of his face, and a covering of suitable yielding material over said recessed edges for closing the same against ingress of light when using the apparatus.

3. An apparatus for demonstrating ocular fluorescence, comprising a boX forming a 'dark chamber and provided at one side With an opening adapted to the shape of the face, and at the opposite side With a mirror arranged in the box, the two lateral Walls of the box being provided with openings, a dark blue glass plate secured detachably in place over the opening in one lateral Wall, and a plate impervious to light secured detachably in place over the opening in the other lateral Wall.

4. An apparatus for observing the fiuoreseenee of the human eye, comprising a dark In testimony that I claim the foregoing chamber, a mirror therein7 an opening for as my invention, I have signed my name 1n the eyes opposite the mirror, and means for presence of two subscribing Witnesses.

admitting dark blue colored light to the FRIEDRICH ALBIN SCIIANZ. 5 chamber lateially of the line of vision be-` Witnesses:

tween the eyes and the mirror. OTTO VOLFF,

Dated this 4th day of September 1913. GASTON MLLER.

Gopies of this patent; may -belobtained for ve cents each, "by addressing the Commissioner of Patents, Washington, D. C. 

